I did a quick mock-up of how I am planning to set up the boat console this winter.
The left side will include the important engine instruments, ignition, and switches for lesser-used electrical items since they will be partially blocked by the steering wheel. The center will house the Garmin GPSMap 546 GPS/fish finder unit, and the right side will contain fuel, trim, speed, volt, and EGT gauges. Below the right-side instrumentation will be electrical switches for more frequently used electrical circuits, such as bilge pump, running lights, blower, and battery relays.
The Garmin is a bracket mount unit, but I think I can figure out how to panel-mount it so that the angle is okay. I’m planning to exclude the existing fuse panel from the console and replace it with a marine-grade circuit breaker panel which will be installed behind the console (inside the cabin).